With its 18-in.Match-grade, cerakoted, stainless steel barrel at the heart of its design, the m15tac18 blends rugged durability with exacting precision.The tactical handguard's slim, octagonal profile sports a full length mil-std 1913 12 o'clock rail for sights and accessories.All tactical series rifles include magpul mbus flip-up sights and moe pistol grips.The dual purpose, flash hiding compensator tames recoil while reducing signature.Metal Finish: Black Hardcoat Anodized/Black PhosphateAction: Semi-AutoCaliber: 223 WyldeBarrel Length: 18"Capacity: 30+1Trigger: Two-Stage PrecisionSafety: AmbidextrousOal: 35.60"-38.90"Weight: 7.20 lbsStock Description: Adjustable Magpul STR CollapsibleMuzzle: Flash HiderReceiver Material: 7075 T6 AluminumSights: Magpul MBUS Front & RearBarrel Description: Maganese Phosphated SteelTwist: 1:8"Barrel Length Range: 18" to 18.99"Weight Range: 7 lbs to 7.99 lbsHand: RightStock Finish Group: BlackMetal Finish Group: Blued/Black